April 3 - 1:55pm EDT   Griffin Technology has announced ClearBoost, a protective case for iPhone with a built-in booster antenna. Thee polycarbonate case claims to offer greater coverage and faster downloads as well as the protection from bumps and scratches. Griffin says the ClearBoost for iPhone is the first of a family of antenna boosting cases based around the "ClearBoost technology." The company says the case works by capturing more of the available wireless signals and passing it to the internal iPhone antenna. ClearBoost for iPhone, priced at $30, is available now. [full story]